Hand-power stump-extractor.



J. F. GORMAN. HAND P OWEB STUMP EXTRACTOR.

APPLICATION FILED OCT-111 915.

Patented May 30,1916.

lA/VE/VTOR John F German.

J'OI-IN F. G'OBMAN, 0F SEATTLE, WASHINGTON.

HAND-POWER STUMP-EXTR-ACTOR.

Specification of Letters Patent.

Patented May so, 1916.

Application filed October 1, 1914. Serial No. 864,545.

To all whom it may concern:

Be it known that 1, JOHN F. GORMAN, a citizen of the United States, andresident of Seattle, in the county of King and State of Washington, haveinvented a new and useful Hand-Power Stump -Extractor, of which thefollowing is a specification.

My invention relates to improvements in hand power stump extractors, andthe objects of my improvements, are: 1. To provide a simple and durableconstruction combining great power with low cost of manufacture. 2. Toprovide a simple means of securing high, low and reverse speeds. 3. Toprovide a portable device of extremely light weight.

Having thus indicated the ends sought by me, reference is to be had tothe accompanying drawings forming a part of this specification in whichsimilar characters of reference indicate corresponding parts in all ofthe figures.

In the drawings: Figure 1 is a plan view of the machine in the ordinaryoperating position. Fig. 2, is a vertical section of same in the centralplane. Fig. 3, is a bottom view of the driving and controlling mechanismin the reverse position with parts broken away. Fig. 4, is a bottom viewof the same with a driving mechanism released.

As illustrated 1 and 2 constitute a portable frame made of any suitablematerial in which the entire mechanism is inclosed. As shown in Fig. 2,the memebrs 1 and 2, preferably of cast metal are connected by the bolt'3 and spacer 4. At the rear end the said members are held in alinementby the bolt 40 connecting the projections 5 and 6, while the forwardthrust of the frame member 2 is borne by the projection 7 of theframe 1. By this construction great rigidity is secured with a minimumof connecting parts. It is apparent that the frame member 2 may befitted to the projection 7 without finishing the contiguous faces of thecastings at this point.

The drum 8 of cast metal incorporated with the ratchet wheel 9 isrotatably mounted in the bearings formed by hubs on the frame members 1and 2 as shown. Said drum is rotated clock wise as shown in Fig. 1 bythe pawls 10 and 11 engaging respectively the interior and exteriorfaces of the ratchet wheel 9. Said pawls are mounted on ournals 12 and13 incorporated with the rocker I l. The pawl 10 is held in position bythe upper flange of the drum 8, and the pawl 11 by washer and split pin.The rocker 14 mounted in the hub forming part of the frame 1, is held inposition by the flange 15 in the groove formed by said rocker and thecollar 16, rigidly attached thereto,preferably by set screws as shown.Rocking motion is given to the rocker 1 1 by the hand operated lever 17fitting over the square portion of said rocker.

Vfhen it is desired to operate the drum at high speed for the purpose ofmoving light ob ects, or of taking up slack in the line, the lever 17may be placed on the square portion of the clutch member 18 engagingcorre sponding teeth upon the drum 8, thus rotat ing the drum duringclock wise rotation of the' lever. When the lever 17 is moved counterclock wise the drum is held stationary by the pawls 10' and 11 retainedin engagement with the ratchet wheel 9 as to be hereinafter described.Meanwhile the teeth of the clutch member 18 move upon the correspondingteeth of the drum 8 and are brought again into engagement therewith bythe spring 19 through the medium of the belt 20 moving freely in thedrum 8. 7

Referring to the Figs. 1 and 2, during the clock wise rotation of thedrum at either high or low speeds, the pawls 10 and 11 are held inengagement with the ratchet wheel 9 by the springs 21 and 22 through themedium of the members 23 and 24, pivotally mounted upon the inner faceof the frame member 1. These members 23 and'24 are operatively connectedto Z shaped members 28 and 29, the connection of which to be more fullydescribed. The Z shaped 1nemhere are in turn pivotally attached to athumb nut 27 located intermediate the said members 23 and 2 1. Thus whenthe thumb nut is turned clock wise, the Z shaped memother, causing theouter ends thereof to be disengaged from the notches provided in theslots in the frame member 1. The springs 30 which cause said members 28and 29 to be held in the notches during counter clock wise rotation ofthe ratchet wheel are held in compression thereby.

When it is desired to allow a gradual reverse motion of the drum thetension in here 28 and 29 are caused to approach each with a the cable25 being sufficient to effect such rotation, the engagement of the pawlsl0 and 11 with the ratchet wheel 9 is controlled as shown in Fig. 3. iireciprocating motion being given by the lever 17 either pawl as 11 isheld in contact with the ratchet wheel 9 by friction against the teeththereof until it occupies a position near the end of its backward strokeas shown by dotted lines. At this point the forward motion of thealternate pawl 10 effects a slight forward rotation of the ratchet wheelreleasing the contact of the pawl 11 therewith. The spring 26 compressedbetween the pawls 10 and 11 thrusts the pawl 11 to the position shown infull lines.

T he thumb nut 27 rotatably mounted in the frame member 1, more clearlyshown in Fig. 1, having been rotated to the position shown in Fig. 3,the Z shaped members 28 and 29 thrust the members 23 and 24 against thesprings 21 and 22, to the position shown.

The Z shaped members 28 and 29, preferably of wire, have outwardprojections engaging the thumb nut 27 and inward propections extendingthrough slots as shown, in frame member 1. Springs 30 inserted in theseslots retain the members 28 and 29 in notches in said slots as shown inFig. 3. Upon the forward motion of either pawl as 10, the inclined face31 engaging the member 23 forces said pawl again into engagement withthe ratchet wheel 9.

l/Vhen it is desired to completely release the drum 8, the thumb nut 27is turned to the position shown in Fig. l, thrusting the members 23 and2-1 to the extreme outer positions, and the spring 26 thrusts the pawls10 and 11 completely out of engagement with the ratchet Wheel 9.

The cable 25 is secured to the drum 8 by means of the key-hole shapedslot 32 in said drum, the end of said cable being provided projectioncapable of passing through the large end only of said slot. The rear endof frame member 1 is provided with a wedge 3%. The tail hold 35 extending around a groove in the slidable wedge draws said wedge toward thelips 33 and is securelyheld by friction with these members. The wedge 34is preferably mounted upon a projection cast to the frame 1 and is heldin position by bolt 36 passing through said projection. This wedge isslidable thereon as shown in dotted line in Fig. 1 to permit thewithdrawal of the tail hold 35.

Having thus indicated the ends sought by me what I claim as new anddesire to protect by Letters Patent is:

1. In a stump extractor, the combination with a frame, a drum rotatablymounted therein, a ratchet wheel rigidly connected to said drum, arocking member rotatably mounted within the frame in the same plane asthe ratchet wheel, said ratchet wheel provided with outer and innerteeth, reciprocating pawls pivotally connected to said rocker andadapted to engage the outer and inner teeth of said ratchet wheel, meansfor controlling the contact of said pawls with said ratchet teeth, saidmeans provided with spring actuated parts for predetermining the actionof the controlling means, springs connected to the main frame andbearing against the controlling means of the respective pawls, and alever adapted to be attached to said rocker for producing the rotarymotion to said drum.

2. In a stump extractor, the combination with a frame, a drum rotatablymounted therein, a ratchet wheel rigidly connected to said drum, meansof rotating said drum independently of said ratchet wheel, a rockingmember rotatably mounted within said frame in the same plane as theratchet wheel, said ratchet wheel provided with outer and inner teeth,reciprocating pawls pivotally connected to said rocker and adapted toengage the outer and inner teeth of said ratchet wheel, a thumb nutcontrolling means having connecting links, pivoted members operativelyconnected to said connecting links, said pivoted members adapted toengage said pawls, slots having notches provided in said frame, springsinterposed in said slots and adapted to press said links into saidnotches thereby predetermining the action of said pivoted members intheir contact with said pawls, springs adapted to compress said pivotedmembers against said pawls when not withheld by said controlling means,and a spring located between said pawls for disengaging their contactwith said ratchet teeth when the contact of the pivoted members withsaid pawls has been withheld by said controlling means, and a leveradapted to be attached to either said rocker, or to the means ofrotating said drum, for producing high and low speeds of said drum.

JOHN F. GORMAN. Witnesses H. C. AULD, E. B. HERALD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington. D. C.

